It is true that an adequate digestion is essential for absorption, and as a matter of fact, the whole digestive machinery has evolved with the only intention of making the foodstuff suitable for absorption. But if we look to the phenomenon from the opposite standpoint, it will be seen that absorption also is no less important for digestive process. The [...]
In this article we will discuss about the structure of an excretory organ in human body, with the help of a suitable diagram. Excretion is defined as the removal of toxic materials and waste products of metabolism from organisms. The metabolic reactions within the body are always creating waste products. There are two main sets of excretory organs for removing [...]
The following article will guide you about how muscles move bones at a joint in human body. Muscles work in the following way: (i) They can pull but never push. (ii) They pull only when they contract. (iii) When they contract, they decrease in length. (iv) When returning to their original length, they relax (not 'expand'). (v) They are attached [...]